Big-bounce genesis

被引:59
作者
Li, Changhong [1 ,2 ,3 ]
Brandenberger, Robert H. [4 ]
Cheung, Yeuk-Kwan E. [5 ]
机构
[1] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
[2] Yunnan Univ, Dept Astron, Kunming 650091, Peoples R China
[3] Yunnan Univ, Sch Phys Sci & Technol, Kunming 650091, Peoples R China
[4] McGill Univ, Montreal, PQ H3A 2T8, Canada
[5] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
关键词
COSMIC-RAY; PERTURBATIONS; PLANCK; BANG;
D O I
10.1103/PhysRevD.90.123535
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report on the possibility of using dark matter particle's mass and its interaction cross section as a smoking gun signal of the existence of a big bounce at the early stage in the evolution of our currently observed universe. A model independent study of dark matter production in the pre-bounce contraction and the post-bounce expansion epochs of the bounce universe reveals a new venue for achieving the observed relic abundance of our present universe, in which a significantly smaller amount of dark matter with a smaller cross section-as compared to the prediction of standard cosmology-is produced and the information about the bounce universe evolution is preserved by the out-of-thermal-equilibrium process. Once the value of dark matter mass and interaction cross section are obtained by direct detection in laboratories, this alternative route becomes a signature prediction of the bounce universe scenario.
引用
收藏
页数:6
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